Re: [Qemu-devel] [RFC PATCH v5 0/4] Separate thread for VM migration

[Avi Kivity]

On 08/25/2011 09:29 AM, Umesh Deshpande wrote:
> Jitterd Test
> I ran jitterd in a migrating VM of size 8GB with and w/o the patch 
> series.
> ./jitterd -f -m 1 -p 100 -r 40
> That is to report the jitter of greater than 400ms during the interval 
> of 40 seconds.
>
> Jitter in ms. with the migration thread.
> Run    Total (Peak)
> 1        No chatter
> 2        No chatter
> 3        No chatter
> 4        409 (360)
>
> Jitter in ms. without migration thread.
> Run    Total (Peak)
> 1        4663 (2413)
> 2        643 (423)
> 3        1973 (1817)
> 4        3908 (3772)
>
> --------------------------------------------------------------
> Flood ping test : ping to the migrating VM from a third machine (data 
> over 3 runs)
> Latency (ms) ping to a non-migrating VM    : Avg 0.156, Max: 0.96
> Latency (ms) with migration thread             : Avg 0.215, Max: 280
> Latency (ms) without migration thread        : Avg 6.47,   Max: 4562

Very impressive numbers.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.